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How much does it cost to replace an engine coolant thermostat?

The cost to replace an engine coolant thermostat can vary depending on the make and model of your vehicle, as well as the specific parts and labor required. On average, you can expect to pay between $150 to $300 for the entire replacement process.


What is an Engine Coolant Thermostat?


The engine coolant thermostat is a critical component in your vehicle's cooling system. It is responsible for regulating the temperature of the engine by controlling the flow of coolant. When the engine is cold, the thermostat blocks the coolant from circulating, allowing the engine to reach its optimal operating temperature quickly. Once the engine is warmed up, the thermostat opens to allow the coolant to circulate and prevent the engine from overheating.


Factors Affecting the Replacement Cost


The cost to replace an engine coolant thermostat can vary based on several factors:



  • Vehicle Make and Model: The cost of the thermostat itself can range from $20 to $100 or more, depending on the specific make and model of your vehicle. Luxury or high-performance vehicles tend to have more expensive parts.

  • Labor Costs: The labor required to replace the thermostat can range from 1 to 2 hours, depending on the accessibility of the component in your vehicle. Labor rates can vary from $50 to $150 per hour or more, depending on your location and the mechanic's expertise.

  • Additional Parts: In some cases, replacing the thermostat may require additional parts, such as a new gasket or coolant, which can add to the overall cost.


It's important to note that the cost can also be influenced by the specific symptoms you're experiencing, as well as the overall condition of your vehicle's cooling system.


When to Replace the Thermostat


The engine coolant thermostat is typically recommended to be replaced every 60,000 to 90,000 miles, or as part of a routine maintenance schedule. However, it's important to monitor your vehicle's performance and replace the thermostat if you notice any of the following signs:



  • Overheating engine

  • Slow engine warm-up

  • Inconsistent temperature readings

  • Coolant leaks around the thermostat housing


Replacing the thermostat at the first sign of an issue can help prevent further damage to your vehicle's cooling system and engine.

How do I know if my coolant thermostat is bad?


5 Signs Your Thermostat Is Broken

  1. You Notice Erratic Temperature Changes.
  2. You Find Incorrect Readings on the Temperature Gauge.
  3. Your Vehicle Makes Concerning Noises.
  4. You Find Coolant Leaks.
  5. You Notice Problems with the Heating System.



Will a stuck thermostat throw a code?


A stuck thermostat will also trigger several indicators, warnings, and fault codes. As you read above, you'll first notice the blue low-temperature indicator that constantly stays on.



Can you drive with a broken coolant thermostat?


Driving a car with a broken thermostat is not advisable. The thermostat regulates the engine's temperature by controlling the flow of coolant. If it's stuck closed, the engine can overheat, leading to severe damage such as a blown head gasket or warped cylinder head.



How long does it take a mechanic to replace a thermostat?


Car thermostat replacement time is 30 to 60 minutes, depending on the make of the car. It will cost you around $190 to $350, including labor. Thermostat repairs usually take more time, requiring extra time to diagnose and analyze the vehicle's thermostat. It can take up to 2 hours.



Can I replace my thermostat myself?


In most cases, installing a new thermostat is a relatively simple do-it-yourself project that can result in improved comfort and convenience and one that can help you save energy.



How do I know my coolant temperature is bad?


In many vehicles, a faulty coolant temperature system will trigger a check engine light or service engine light on your car's dashboard.



Can I replace my thermostat easily?


In most cases, installing a new thermostat is a relatively simple do-it-yourself project that can result in improved comfort and convenience and one that can help you save energy. At Lowe's, our range of thermostats will make it easy to find a device that offers the controls and features you need.



Is it easy to replace a coolant thermostat?


Most automobile thermostats are fairly easy to change. Just follow the upper radiator hose leading to the engine and it should be there at the end of the hose. Usually just two bolts.



How long does a coolant thermostat take to replace?


Car thermostat replacement time is 30 to 60 minutes, depending on the make of the car. It will cost you around $190 to $350, including labor. Thermostat repairs usually take more time, requiring extra time to diagnose and analyze the vehicle's thermostat. It can take up to 2 hours.



How much does a mechanic charge to change a thermostat?


The average cost for car thermostat replacement is $661 to $747. Enter your vehicle's information to see how much thermostat replacement costs in your local area.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.